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论文类型：期刊论文

发表时间：2013-02-01

发表刊物：JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS

收录刊物：SCIE、EI、Scopus

卷号：74

期号：2

页面范围：360-365

ISSN号：0022-3697

关键字：Oxides; Polymers; Chemical synthesis; Electrochemical properties

摘要：Polyaniline-MnO2 nanowire (PANI-MNW) composites were prepared by in situ chemical oxidative polymerization of aniline monomer in a suspension of MnO2 nanowires. The structure and morphology of the PANI-MNW composites were characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). Their electrochemical properties were investigated using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy in 1 mol/L KOH electrolyte. The PANI-MNW composites show significantly better specific capacity and redox performance in comparison to the untreated MnO2 nanowires. The enhanced properties can be mainly attributed to the composite structure wherein high porosity is created between MnO2 nanowires and PANI during the process of fabricating the PANI-MNW nanocomposites. A specific capacitance as high as 256 F/g is obtained at a current density of 1 A/g for PANI-MNW-5, and the composite also shows a good cyclic performance and coulomb efficiency. (C) 2012 Elsevier Ltd. All rights reserved.